The combined speed after the collision is -2.8 m/s.
How to get the combined speed?
Here we must have conservation of momentum, where momentum is the product between mass and velocity.
At the beginning, one of the players has a mass of 80kg and a velocity of 8m/s, so its momentum is:
P₁ = 80kg*(8m/s) = 640 kg*m/s
The other player has a mass of 120 kg and runs in the opposite direction at a speed of -10m/s (the negative sign is because of the direction). So its momentum is:
P₂ = 120kg*(-10m/s) = -1200 kg*m/s
The initial total momentum is:
P = P₁ + P₂ = 640 kg*m/s + ( -1200 kg*m/s) = -560 kg*m/s
At the end, the move together as a mass of (80kg + 120kg) = 200kg with a velocity V.
Such that the final total momentum is equal to the initial total momentum.
So we must have:
200kg*V = -560 kg*m/s
V = (-560 kg*m/s)/200kg = -2.8 m/s.
The combined speed after the collision is -2.8 m/s.
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Unequal distribution of wealth means that land and money are controlled by brainly
Answer:a small number of people
Explanation:
i looked it up
An increase in atomic number is related to an increase in atomic mass because
Which details from the land show that it has a historical setting? check all that apply. some formerly enslaved children have a white parent. friends sometimes take the blame for each other. some formerly enslaved people continue to live on the same property. children are able to train horses.
Explanation:
nose peace la verdad solo sigo los pasos de la aplicación jaja
Answer:
A and C
Explanation:
Explain the effect a change in temperature, volume, and pressure has on gas particles. then explain if these changes are an example of a direct or an inverse relationship.
The increase in pressure, with volume constant will increase the temperature. The increase in volume, with pressure constant will increase the temperature. The increase in pressure, with temperature constant will decrease the volume.
What are pressure, temperature and volume?These three are the characteristics of a gas. A gas is always in some pressure, having some volume and temperature.
According to the ideal gas law,
pV =nRT
Here, p is the pressure, V is the volume, n is number of moles, R is the universal gas constant and T is the temperature.
The volume of a gas is directly proportional to its absolute temperature when pressure is constant, according to Charles's law.
The volume of a gas is inversely proportional to its pressure when temperature is constant according to the Boyle's law.
Hence, the increase in pressure, with volume constant will increase the temperature. The increase in volume, with pressure constant will increase the temperature. The increase in pressure, with temperature constant will decrease the volume.
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Which requirement does this source meet for determining accuracy? the information has been updated. the publication uses reliable citations. the publication has been peer reviewed. the information can be cross-referenced.
The requirement this source meet for determining accuracy is the publication uses reliable citations.
What is citation?Citation is the description of the sources, that you used to write your paper, or book or article.
Citations are written on the last which provide the book name, writer's surname, and page numbers.
Thus, the correct option is b, The publication uses reliable citations.
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What was the most serious health concern caused by the poor sanitation and contaminated water supplies in 19th century tenements?
The most serious heath concern caused by the poor sanitation and contaminated water supplies in 19th century tenements is cholera epidemic.
What is Cholera?Cholera is a disease caused by bacteria, vibrio cholarea. The bacteria is present in water.
The symptoms of this disease are diarrhea and dehydration.
Thus, the most serious heath concern caused by the poor sanitation and contaminated water supplies in 19th century tenements is cholera epidemic.
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Drag each item to indicate whether it is an example of water used in the production of food or energy
Based on the above, water used to produce for Food and Energy while energy production require a great deal of Water.
What is energy?The term energy is known to be the ability or the power that is needed to do any kind of work.
Based on the above, water used to produce for Food and Energy while energy production require a great deal of Water as they are both essential source of energy and nutrients.
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Answer:
WATER USED IN FOOD PRODUCTION: irrigating crops, making chocolate
WATER USED IN ENERGY PRODUCTION: cooling thermal plants, running hydroelectric dams
Explanation:
just did the question, these answers are correct.
What is limit of startfraction startroot x + 2 endroot minus 3 over x minus 7 endfraction as x approaches 7? negative one-sixth 0 one-sixth dne
The value of limit of startfraction startroot x + 2 endroot minus 3 over x minus 7 endfraction when x approaches 7 is 1/6.
How to evaluate a function for a given value?To evaluate a function for a particular value, plug in the value of the variable in the function.
The expression given in the problem is,
[tex]\lim_{x \to 7} \dfrac{\sqrt{(x+2)}-3}{x-7}[/tex]
Multiply the factor √(x+2)+3 above and below of fraction,
[tex]\lim_{x \to 7} \dfrac{\sqrt{(x+2)}-3}{x-7}\times\dfrac{\sqrt{(x+2)}+3}{\sqrt{(x+2)}+3}\\\lim_{x \to 7} \dfrac{\sqrt{(x+2)}^2-3^2}{(x-7)(\sqrt{(x+2)}+3)}\\\lim_{x \to 7} \dfrac{x+2-9}{(x-7)(\sqrt{(x+2)}+3)}\\\lim_{x \to 7} \dfrac{x-7}{(x-7)(\sqrt{(x+2)}+3)}\\\lim_{x \to 7} \dfrac{1}{\sqrt{(x+2)}+3)}[/tex]
The value of x tents to 7. Thus,
[tex]}\dfrac{1}{\sqrt{7+2)}+3}\\[/tex]
1/(3+3)=1/6
Thus, the value of limit of startfraction startroot x + 2 endroot minus 3 over x minus 7 endfraction when x approaches 7 is 1/6.
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Answer:
c 1/6
Explanation:
I've already ruined my brand-new jeans, and i've only had them on for three hour!
man that's rough buddy
In the 1800s,______ were passed requiring african americans and white americans to use separate facilities.
Answer:
Jim Crow Laws
Explanation:
This was the sorta begining to segregation and it started because of the Jim Crow Laws.
hope this helps :)
Which key details should be included in an effective summary of "on the art of fiction" by willa cather? select yes or no for each detail.
Willa Cather's critical essay “On the Art of fiction” is about modern literature. It depicts that young writers must condense their ideas and that a first-rate novel should include dozen of good stories.
What is the idea of the book?“On the Art of Fiction” is a book that represents the ideas and opinions of the writer on the modern literary work. She states that a true and young writer should write something new and put some condensed thoughts of their own.
According to her, a novel must have many background sacrifices that get included in the novel as good stories and should not be just pertinent and based on market demands.
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Leadership is a talent that cannot be learned. please select the best answer from the choices provided t f
Answer:
The statement is false because anyone can learn good leadership skills.
Explanation:
Leadership is defined as a skill, not a talent. Through repetition and practice, anyone can learn to become an effective leader.
Which situations result in an increase in the national debt? select the two correct answers.
The two situations that result in an increase in the national debt include, an increase in intergovernmental debt and federal budget deficits.
What is a national debt?A national debt can be defined as the total sum of debts owed by the government of a nation.
Situations that results to an increase in the national debt include:
federal budget deficitsborrowing from the Social Security Trust Fundlow interest rates promoting increased investmentraised debt ceilingsAn increase in intergovernmental debt, etcLearn more about national debt here: https://brainly.com/question/1047372
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What are the two types of long-term memory? a. sensory and short-term b. iconic and echoic c. explicit and implicit d. recency and primacy please select the best answer from the choices provided a b c d
Answer:
C.
explicit and implicit memory
Explanation:
Explicit memories, also known as declarative memories, include all of the memories that are available in consciousness.
Implicit memories are those that are mostly unconscious. This type of memory includes procedural memory.
The mystery food sample contain polysaccharides because the color of the test tube was
Answer:
gelatin
Explanation:
Answer:
Explanation:
The mystery food sample ✔ does notdoescontain polysaccharides because the color of the test tube was ✔ not blue/black.
Alice thinks that she is the president's illegitimate daughter
Answer:
she needs to get a DNA test and she can find out if they are a match if they are then she's legit if not a match then shes correct
Explaination
DNA test
This is a public service announcement. two people sharing ear buds on a poster that reads, "spread music. not flu. even healthy people can get the flu, and it can be serious. everyone 6 months and older should get a flu vaccine. this means you. this means protect yourself, and those around you, by getting a flu vaccine." what is the purpose of this public service announcement? to encourage people to spend time with people who have the flu to inform people that they can catch the flu from their friends to inform people that sharing headphones can spread the flu to encourage people to take precautions against catching the flu
The purpose of this public service announcement is to spread awareness about being protected and stay away from the sharing.
What is flu?Flu also called as Influenza is the symptoms of fever, headache, muscle pain and weakness, dry cough, sore throat as well as a stuffy nose.
"spread music. not flu. even healthy people can get the flu, and it can be serious. everyone 6 months and older should get a flu vaccine. this means you. this means protect yourself, and those around you, by getting a flu vaccine."
This means that music can be spread by sharing but by sharing don't spread flu to your loved ones or friends. Take precautions till you get rid of their symptoms.
Thus, the purpose of this public service announcement is to spread awareness about being protected and stay away from the sharing.
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Answer:
Its B!
Explanation:
:D
Enter the correct 4 digit code (no spaces)
Answer:
a 5
b 9
c 3
d 4
Explanation:
if you were to substitute in these numbers it would be valid.
3+2=5
1+3=4
mabe 4+5 =9
Which term best describes the way the passage is organized the european
Answer:
can you put the choices
Explanation:
thanks
What should a country that wants to increase its comparative advantage when trading with another country try to do
Comparative advantage is the profit when the goods are produced at less cost. To increase comparative advantage the opportunity cost must be reduced.
What are opportunity cost and comparative advantage?Opportunity cost is the loss of the potential value and the benefit when an alternative resulting in the harm is chosen over another activity that should have profited.
The comparative advantage is the capacity that the goods can be produced at less cost than the other activities so that it becomes profitable.
Therefore, by lowering the opportunity cost the comparative advantage can be increased.
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What would be an effective claim for this assignment? more frequent use of class blogs and on-line calendars would greatly decrease paper cost and waste. teachers currently use paper handouts for all quizzes, tests, course syllabi, and newsletters. copy machines are busy every morning, making paper copies for the 1,200 members of our student body. our school has implemented a recycling program that ensures that no paper, glass, or aluminum is taken to the dump.
An assertation used in the speech about environment friendly can be about the present use of the paper handouts by the teachers for the tests and quizzes. Thus, option B is correct.
What is a claim?A claim is factual, and the valuable assertion that is used in essays is to provide the evidence in case of a dispute so that the truth is established. It is made based on textual evidence and facts.
During the counterargument or the argument, the claims are made so that the suggestion to deal with the arisen issue can be effectively solved.
Therefore, option B. use of the paper handouts will be the effective claim.
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Why did nero persecute early christians? christians refused to trade with the romans. christians would not serve in the roman army. christianity was viewed as a threat to the empire. christianity preached against the laws of the emperor.
The option C is true, as the Roman leaders feared they were undermining authority.
What is persecution?Persecution is the act of harassing or oppressing a person or a group of people, especially because of their identity.
Many Christians were died or killed when the Roman government began to persecute Christians under Nero, because the Christianity was declared illegal at that time. It was believed that the Christian religion was the counter religion to the traditional Roman religion.
In Rome, the great fire was caused because of the persecution of the Christians and because of influence of Christianity in traditional Roman religion. The Christians were persecuted in the next hundred years by the upcoming emperors.
Thus, Option C is true that the Christianity was viewed as a threat to the empire.
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Answer: Its C
Explanation:
I did the test
Where do scientists find pollen grains to study ancient climate change? what attribute of the pollen grains helps scientists identify the types of plants they belonged to?
Answer:
1. in sediment layers
2.Shape
Explanation:i dont have one just trust me
Answer:
1. In sediment layers
2. Shape
Explanation:
Which verb or verb phrase is in the correct tense to complete the sentence? yearn yearned did yearn will yearn
Answer:
it's the one that has action in it
Explanation:
verb is an action in a sentence, like run for example
Often, personal data are transmitted using digital signals. what might go wrong with these transmissions?
Often, personal data are transmitted using digital signals which can lead to that data could be stolen.
What are the ways of data stealing?Many online offerings require customers to fill in non-public info along with the complete name, domestic deal, and credit card number.
The statistics might be accessed or stolen. The statistics are probably stolen or accessed via way of means of stealing. Digital Signals. Digital and alerts are transmitted via electromagnetic waves.
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A digital signal encodes information as a series of discrete numbers. At any one time, a digital signal can only have one value from a finite set of possible values. Many physical quantities, such as changeable electric current or voltage, can be utilized to represent information in digital signals.
The one disadvantage of transmitting personal data using digital signals is that they are prone to loss, tampering, and other forms of destruction. If a third party manages to intercept the signal and modify it, the information may be subject to unauthorized use or disclosure.
Additionally, encryption algorithms can only protect against casual eavesdropping; they do not prevent intentional acts by malicious computer hackers (or snooping government agents).
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Since it was a school day denise thought it was peculiar
Answer:
what is the question?
Explanation:
no image, no real way to solve this problem
If you study bird ___, you'll learn that birds' bodies are well-adapted for flight.
Answer:
anatomy
Explanation:
birds' bodies is the clue
You inspect a bottle of sunscreen to see what radiation it claims to block. you are looking for sunscreen that blocks dangerous radiation from the sun but does not make claims about other types of radiation. which claim on a bottle would best meet these criteria?
The claim on a bottle would meet the criteria is Blocks all UV and infrared rays. The correct option is A.
What are UV rays?UV rays are ultraviolet rays that come from the sun. This is harmful rays which affect the skin and body.
Infrared rays have longer wavelength than visible light and UV rays have shorter wavelength than visible light.
Thus, the correct option is A, blocks all UV and infrared rays.
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Which example lists minerals from hardest to softest? apatite, quartz, fluorite, talc diamond, talc, fluorite, topaz talc, calcite, orthoclase, diamond corundum, quartz, calcite, gypsum
Based on the Mohs hardness scale corundum, quartz, calcite, and gypsum are minerals listed from hardest to softest. Thus, option D is accurate.
What is the Mohs scale?Minerals are inorganic compounds that have characteristic structures and physical forms. The hardness and the softness of the minerals are estimated by the Mohs hardness scale.
Hardness is the physical characteristic that defines the resistance level of getting penetrated and scratched. According to the scale, the level of hardness is corundum (9), quartz (7), calcite (3), and gypsum (2).
Therefore, option D. corundum, quartz, calcite, and gypsum are minerals listed from hardest to softest.
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After getting married, joe, 32, and melinda, 29, decide to take out life insurance policies. joe would like a 15-year term policy and melinda would like a 20-year term policy. they each want a $300,000 policy. how much can joe and melinda expect to pay in premiums the first year? for age 32, a male 15-year term policy is 3.32 and 20-year term is 5.45. for age 29, a female 15-year term is 2.58 and 20-year term is 4.96. a. $2,478 b. $2,484 c. $1,488 d. $2,409
Based on above scenario of their ages and cost of insurance for their age and length of policy, the total premium is said to be $2,484.
What is the premium about?Note that in the scenario given above;
Joe annual premium is said to be = Cost for 32 year old with 15 year policy x Policy amount / 1,000
So therefore, it will be = 3.32 x 300,000 / 1,000
= $996
That of Melinda annual premium = Cost for 29 year old with 20 year policy x Policy amount / 1,000
So therefore, it will be = 4.96 x 300,000 / 1,000
= $1,488
Therefore the Total annual premium = Joe premium + Melinda premium
= 996 + 1,488
= $2,484
Therefore, the total premium would be $2,484.
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